Yet the Legislature has found a wondrous way to bridge the political, cultural, ethnic and geographic fault lines that cleave the Golden State. It has presented us with a gift — an issue on which all Californians are truly of one mind.

Proposition 13, a constitutional amendment on the June 8 ballot, is a matter of so little controversy that it passed through both houses of the Legislature without a single dissenting vote. And nobody, not one cranky gadfly among the more than 36 million Californians, could muster the energy to write a dissenting argument for the official voters’ guide.

Of course, the Proposition 13 is of so little consequence that it’s hard to grasp why it’s on the ballot. The measure would clarify the tax treatment of earthquake-proofing on unreinforced masonry buildings. Currently, such improvements do not trigger property-tax reassessments for 15 years. Proposition 13 would make the exemption permanent.

Sounds fair enough. It doesn’t make sense to punish property owners who make older buildings safer. The odd part, though, is that in practice county assessors don’t tax seismic retrofits anyway, according to the legislative analysis of the bill that put the measure on the ballot. Even the office of state Sen. Roy Ashburn, who sponsored the legislation, couldn’t point to any actual cases where counties had tried, though a representative stressed the importance of making the law clear and unambiguous.

It’s really hard to see why it’s worth the trouble and expense — nearly $500,000 just for the secretary of state’s office to do the printing — of a constitutional amendment for such a trivial matter. Indeed, that such a picayune legal clarification requires the ratification of the voters highlights how California’s constitutional system has become far too cumbersome.

But let’s not spoil the good feelings of this rare moment of unanimity. Californians can’t even agree on Mom, the flag and apple pie, but we can all march behind the banner of seismic retrofits for unreinforced masonry buildings and vote yes on Proposition 13.